ZJ70/4500LDB , High Efficiency Electrical Onshore Oil Drilling Rig
• The main rig power system are diesel engine driven AC generators
with enough power for operating the rig.
• The power drive system available in SCR (AC-SCR-DC) or VFD
(Variable Frequency Drive, AC-DC-AC) System.
• The drawworks electrically driven by heavy duty DC or AC motors,
with working speed continuously adjustable. Disc brake introduced
as the main drum brake equipped with the drawworks unit.
• The mud pumps equipped with the rig are single action, triplex
slurry pumps, electrically driven by AC or DC motors.
• Rotary table independently driven by a drive system consisting of
• Air system equipped with the rig, consisting of two each screw
rod type air compressor, air tanks and valves.
Main technical parameters
Nominal drilling depth
7000m ( 114mmDP )
Quantity and power of drilling pump
6000m ( 127mmDP )
Max hook load
Substructure height and clear height under RT beam
Wire rope system of traveling system
6 × 7 , parallel
Mast type and effective height
DW rated power
1470 kW ( 2000hp )
Quantity/power of main diesel engine
4 forward+ 2 reverse
6 forward+ 2 reverse
Quantity/power of auxiliary generator set
Diameter of drilling wire rope
Quantity and power of VF motor
RT opening diameter
950mm ( 37 1/2″ )
HP mud manifold